Incoming hostname: incoming.zoobuh.com
Outgoing hostname: outgoing.zoobuh.com

POP3 port 110
SMTP port 587

SSL should be enabled, preferably TLS/STARTTLS
Username is the complete email address.

*If you specifically have the TLS option, use it. Some clients will use TLS even with SSL unchecked. The biggest connection issue is failure to keep the port at 110. Some clients change this to a different port number when you change the SSL/TLS options.